[linux-next:master 4719/11136] drivers/char/tpm/tpm_loongson.c:48:10: error: incompatible function pointer types initializing 'int (*)(struct tpm_chip *, u8 *, size_t, size_t)' (aka 'int (*)(struct tpm_chip *, unsigned char *, unsigned long, unsigned long)') with an expression of type ...

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   846bd2225ec3cfa8be046655e02b9457ed41973e
commit: 5c83b07df9c5a6e063328c5b885de79f8e8f0263 [4719/11136] tpm: Add a driver for Loongson TPM device
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20250921/202509211250.mD8JS2nu-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250921/202509211250.mD8JS2nu-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509211250.mD8JS2nu-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/char/tpm/tpm_loongson.c:9:
   In file included from drivers/char/tpm/tpm.h:28:
   include/linux/tpm_eventlog.h:167:6: warning: variable 'mapping_size' set but not used [-Wunused-but-set-variable]
     167 |         int mapping_size;
         |             ^
>> drivers/char/tpm/tpm_loongson.c:48:10: error: incompatible function pointer types initializing 'int (*)(struct tpm_chip *, u8 *, size_t, size_t)' (aka 'int (*)(struct tpm_chip *, unsigned char *, unsigned long, unsigned long)') with an expression of type 'int (struct tpm_chip *, u8 *, size_t)' (aka 'int (struct tpm_chip *, unsigned char *, unsigned long)') [-Wincompatible-function-pointer-types]
      48 |         .send = tpm_loongson_send,
         |                 ^~~~~~~~~~~~~~~~~
   1 warning and 1 error generated.


vim +48 drivers/char/tpm/tpm_loongson.c

    44	
    45	static const struct tpm_class_ops tpm_loongson_ops = {
    46		.flags = TPM_OPS_AUTO_STARTUP,
    47		.recv = tpm_loongson_recv,
  > 48		.send = tpm_loongson_send,
    49	};
    50	

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